The Impact of Reaction Pressure on the Catalytic Performance of the Pd[BOND]Sb/TiO2 Catalyst in the Acetoxylation of Toluene into Benzyl Acetate

Authors

  • Dr.  Neetika Madaan,

    1. Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock (Germany), Fax: (+49) 0381-1281-51246
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  • Dr.  Suresh Gatla,

    1. Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock (Germany), Fax: (+49) 0381-1281-51246
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  • Dr.  Venkata Narayana Kalevaru,

    1. Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock (Germany), Fax: (+49) 0381-1281-51246
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  • Dr.  Jörg Radnik,

    1. Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock (Germany), Fax: (+49) 0381-1281-51246
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  • Dr.  Marga-Martina Pohl,

    1. Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock (Germany), Fax: (+49) 0381-1281-51246
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  • Prof.  Bernhard Lücke,

    1. Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock (Germany), Fax: (+49) 0381-1281-51246
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  • Prof.  Angelika Brückner,

    1. Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock (Germany), Fax: (+49) 0381-1281-51246
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  • Dr.  Andreas Martin

    Corresponding author
    1. Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock (Germany), Fax: (+49) 0381-1281-51246
    • Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock (Germany), Fax: (+49) 0381-1281-51246

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Abstract

The acetoxylation of toluene in the presence of acetic acid and oxygen was performed over a Pd[BOND]Sb/TiO2 catalyst at 210 °C and at various reaction pressures (1–10 bar). A remarkable improvement in the catalytic performance and a significant shortening of the induction period were found with an increase in pressure. At a pressure of 6 bar, the highest toluene conversion of 75 % and 100 % selectivity for benzyl acetate were observed. This result could be due to both the restructuring of the catalyst surface and to the formation of active Pd[BOND]Sb particles of desired size, composition, and shape during the course of the induction period. Samples of the most-active and spent catalysts were studied by ex situ and in situ XRD, XPS, and TEM.

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